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Re: [PATCH-for-9.2? v2 1/2] hw/display/vga: Do not reset 'big_endian_fb'


From: Benjamin Herrenschmidt
Subject: Re: [PATCH-for-9.2? v2 1/2] hw/display/vga: Do not reset 'big_endian_fb' in vga_common_reset()
Date: Fri, 06 Dec 2024 10:00:37 +1100
User-agent: Evolution 3.52.3-0ubuntu1

On Tue, 2024-12-03 at 11:51 +0100, Gerd Hoffmann wrote:
> 
> The only case I'm aware of where the byte order is actually switched is
> booting a ppc64le guest in a pseries machine, where the opal firmware
> runs in bigendian mode and the linux kernel runs in little endian mode.
> 
> So here the changed reset behavior could actually make a difference, but
> you will only notice if the opal firmware does *not* set the byte order
> register.

OPAL (well skiboot) doesn't display anything anyways (or at least it
didn't when I wrote it :-). It just boots Linux as a bootloader. So as
long as Linux itself sets the register it should be fine.

Cheers,
Ben.



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